The cute couple kept things super professional during their strategy meeting, not making any references to their relationship. However, it was evident in their sly smiles and fleeting glances that the spark is still very much alive.

Shelton also expressed how excited he was that Stefani had returned to The Voice after serving as a coach during seasons seven and nine. The pair connected through shared heartbreak last season, as Stefani split from husband Gavin Rossdale and Shelton divorced wife Miranda Lambert.

And if you thought Shelton only asked his girlfriend to be the Team Blake mentor because of their adorable relationship, the "Came Here to Forget" singer argued that the decision was made entirely in the interest of winning this season.

"I brought Gwen in because if there's anybody who understands what a battle round is, it's somebody who's been a coach," Shelton explained. "She knows what it takes to win this thing."

While Stefani didn't actually win during either season that she served as coach, she did get contestant Jeffery Austin to the finals last season.